PR Related to https://github.com/github/semmle-code/pull/40918
Removes the upgrades pack and uses ql/lib/upgrades instead.
Also, fix malformed parameter in instruction.
Co-authored-by: Chris Smowton <smowton@github.com>
Also add support for building the extractor inside this repository
so that users can build and use the extractor, and an up-to-date
version can be used for testing.